Hi Mike,
   Thanks for getting back to me.

Like my previous post with the example, I am trying to accomplish a tree like structure with collapsing header nodes.
The Child nodes under a header section differ. They are not consistent.
The child to the header node mimics like a grid. Each column (Cell) is a Control (e.g, Checkbox, combo, text box, etccc).
The number of rows is not finite.

My initial thought was can a (UserControl) be added as a child node? I guess this is not possible.

Do let me know if I am not clear in my explanation

Thanks
Aditya

Hi Aditya,

You can't embed another control or grid inside the three. But you do not have to. The tree already supports a grid-like display just like you have here. 

What you would do is add your root level nodes to the three. Then for the child nodes, you would apply a ColumnSet to the nodes collection's Override with a set of columns that you would. For the node under the second parent node, you would apply a different ColumnSet with a different set of columns. 

Thanks for the sample code Mike.

I did get the sequence of steps that need to be done to form the tree.
I was missing a step in between.
The way we were adding the columnSets to the parent node was different.

Thank You once again.
Aditya

 Here's a little sample code I whipped up to demonstrate how to set up a tree like this: 

            this.ultraTree1.ViewStyle = ViewStyle.FreeForm;
            UltraTreeNode parentNode1 = this.ultraTree1.Nodes.Add("Parent 1");
            UltraTreeNode parentNode2 = this.ultraTree1.Nodes.Add("Parent 2");

            UltraTreeColumnSet columnSet1 = new UltraTreeColumnSet();
            columnSet1.Columns.Add("A");
            columnSet1.Columns.Add("B");
            columnSet1.Columns.Add("C");

            parentNode1.Nodes.Override.ColumnSet = columnSet1;

            UltraTreeColumnSet columnSet2 = new UltraTreeColumnSet();
            columnSet2.Columns.Add("1");
            columnSet2.Columns.Add("2");           

            parentNode2.Nodes.Override.ColumnSet = columnSet2;

            UltraTreeNode childNode = parentNode1.Nodes.Add();
            childNode.Cells["A"].Value = "A1";
            childNode.Cells["B"].Value = "B1";
            childNode.Cells["C"].Value = "C1";
            childNode = parentNode1.Nodes.Add();
            childNode.Cells["A"].Value = "A2";
            childNode.Cells["B"].Value = "B2";
            childNode.Cells["C"].Value = "C2";
            childNode = parentNode1.Nodes.Add();
            childNode.Cells["A"].Value = "A3";
            childNode.Cells["B"].Value = "B3";
            childNode.Cells["C"].Value = "C3";

            childNode = parentNode2.Nodes.Add();
            childNode.Cells["1"].Value = "11";
            childNode.Cells["2"].Value = "21";           
            childNode = parentNode2.Nodes.Add();
            childNode.Cells["1"].Value = "12";
            childNode.Cells["2"].Value = "22";